74FCT521ATSOG8

Overview

The 74FCT521ATSOG8 is an 8-bit identity comparator manufactured by Renesas Electronics Corporation. It operates within a supply voltage range of 4.75V to 5.25V and features active low outputs indicating when inputs A equals B. The device exhibits a maximum propagation delay of 7.2ns at 5V with a 50pF load and draws a maximum static current of 10µA. It is housed in a 20-SOIC package and supports surface mount installation across an operating temperature range of -40°C to +85°C.

Feature Summary

• Provides 8-bit identity comparison functionality with active low output assertion when input vectors are equal.
• Ensures true TTL input and output compatibility for seamless integration with legacy logic families.
• Maintains CMOS power consumption levels while supporting high-speed signal processing capabilities.

Applications

• High-speed data bus monitoring systems requiring precise equality verification
• Address decoding circuits in digital logic architectures
• Memory address matching applications in embedded control systems

Procurement Notes

Verify the specific suffix ATSOG8 to confirm the SOIC-20 package and reel packaging configuration. Ensure the order specifies the A-grade variant to meet the required leakage and performance specifications. Confirm RoHS3 compliance status during procurement to align with environmental regulations. Cross-reference the manufacturer part number IDT74FCT521ATSOG8 if sourcing from alternate distributors to ensure component authenticity and correct revision levels.

Selection Notes

Select this component when an 8-bit equality check is required with minimal propagation delay. The active low output simplifies logic gating in downstream circuitry. The wide operating temperature range makes it suitable for industrial environments. Consider the 20-SOIC footprint for PCB layout constraints. Verify that the 5V supply voltage matches the system design requirements before implementation.

Part Context

This device belongs to the 74FCT logic family, which bridges the performance gap between standard TTL and CMOS technologies. The FCT series is designed for high-speed applications requiring low power dissipation. The 74FCT521 specifically addresses identity comparison needs within this portfolio, offering reliable operation in complex digital systems where timing accuracy is critical.

Replacement Considerations

The IDT74FCT521ATSOG8 is listed as an alias for this component. Verify pinout compatibility and electrical parameters before substituting with other 8-bit comparators in the 74FCT series. Ensure the replacement maintains the same active low output polarity and propagation delay characteristics.